Structure Stabilizing Effect of Tungsten in Mixed Molybdenum Oxides with Mo5O14-Type Structure
Full article
| Common |
Language:
Английский,
Genre:
Full article,
Status:
Published,
Source type:
Original
|
| Conference |
In situ Spectroscopy in Catalytic Conditions : 2nd Symposium
23-27 Apr 2006
,
Toledo
|
| Journal |
Catalysis Today
ISSN: 0920-5861
, E-ISSN: 1873-4308
|
| Output data |
Year: 2007,
Volume: 126,
Number: 1-2,
Pages: 112-118
Pages count
: 7
DOI:
10.1016/j.cattod.2007.03.004
|
| Tags |
Mo5O14-type structure, Redox properties, X-ray diffraction, XAS |
| Authors |
Rödel E.
1
,
Timpe O.
1
,
Trunschke A.
1
,
Zenkovets G.A.
2
,
Kryukova G.N.
2
,
Schlögl R.
1
,
Ressler T.
3
|
| Affiliations |
| 1 |
Fritz-Haber-Institut der MPG, Department of Inorganic Chemistry, Faradayweg 4-6, D-14195 Berlin, Germany
|
| 2 |
Boreskov Institute of Catalysis, Novosibirsk 630090, Russia
|
| 3 |
Technische Universität Berlin, Institute of Chemistry, Sekr. C2, Strasse des 17. Juni 135, D-10623 Berlin, Germany
|
|
Bulk structural properties of single phase crystalline (Mo0.91V0.09)5O14 and (Mo0.68V0.23W0.09)5O14 materials were investigated using in situ X-ray diffraction and in situ X-ray absorption spectroscopy at three metal edges. Temperature programmed experiments in reducing (propene) and oxidizing (oxygen) atmosphere and isothermal redox experiments at 773 K revealed differences in the bulk properties of the two phases studied. A structure stabilizing effect of tungsten in (MoVW)5O14 under oxidizing conditions was found. Moreover, tungsten centers in a (MoVW) dioxide material exert a structure-directing effect towards re-oxidation to a Mo5O14-type structure.